| APA | URDR. (2012, February 16). In Acronym Geek. Retrieved 08:48, February 16, 2012, from http://www.acronymgeek.com/URDR |
| MLA | "URDR." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/URDR>. |
| MHRA | 'URDR', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/URDR> [accessed 16 February 2012] |
| Chicago | "URDR", http://www.acronymgeek.com/URDR (accessed February 16, 2012). |
| CBE/CSE | URDR [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/URDR. |
| Bluebook | URDR, http://www.acronymgeek.com/URDR (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, URDR, http://www.acronymgeek.com/URDR (optional description here) (as of Feb. 16, 2012, 08:48). |
| AMA | URDR. Acronym Geek. February 16, 2012, 08:48. Available at: http://www.acronymgeek.com/URDR. Accessed February 16, 2012, 08:48. |